Yes, it is possible. This is an example:
perl -C -E'say"\x{e8f4}\x{e8f5}"'
Screenshot: <http://i.imgur.com/wivY9.png>
The magic happens not at the Perl level, but at the rendering step.
I first picked two unassigned codepoints. Unicode provides a private
use area for exactly this kind of purpose.
I also took care not to trample over a [registered script]
(http://enwp.org/ConScript_Unicode_Registry). Then I created a
font with two glyphs, `U+E8F4 ROTATED LATIN CAPITAL LETTER D` and
`U+E8F5 LATIN CAPITAL LETTER A WITHOUT COUNTER`, and installed it.
Last, I restarted my terminal application so that the new font gets
picked up, and executed the Perl one-liner from above.
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